Control of terahertz photoelectron currents generated by intense two-color laser radiation interacting with atoms

Abstract

Using the strong-field approximation, a net photoelectron current, generated due to the interaction of an intense two-color laser field consisting of the fundamental and the second harmonic of infrared laser radiation with an atom, is found. The focus is on the case in which neither of the two field components can be treated perturbatively. The dependence of the current on the ratio of the harmonic amplitudes and their relative phase is studied and parameters maximizing the current are specified.